Abstract: A drip irrigator for potted plants comprises a support base (1) with at least three feet (3) insertable in the ground; a vertically extending body (15) extending downwards from said base (1) between said at least three feet (3) and is provided with an irrigation water containing chamber (16) which is provided-with an upper wall (21) crossed by a filling orifice (20) and with a lower water outlet opening (22). Means (9, 12, 13) for removably superimposing and fixing a water container (10) on said chamber (16) are provided. A float (17) is accommodated in said chamber and provided at the top with a shutter pin (19) engageable with said orifice (20) and disengageable therefrom according to the level of water in said chamber (16). A dripping device (24) is removably inserted into said opening (22) to allow the water to drip one drop at a time, and a substantially ogive-shaped delivery plug (27) is removably fixed at the lower end (26) of said vertically extending body (15).